condition mean min max ZT0-3 65.096555 65.096555 65.096555 ZT4-7 71.6446445 71.6446445 71.6446445 ZT8-11 83.656221 83.656221 83.656221 ZT12-15 80.700532 80.700532 80.700532 ZT16-19 78.32306399999999 78.32306399999999 78.32306399999999 ZT20-23 77.666079 77.666079 77.666079